DOI: 10.1306/10011313054
Scopus记录号: 2-s2.0-84902375491
论文题名: Deltaic deposits formed under spatially and temporally variable accommodation regimes: A plausible alternative explanation for isolated shallow-marine sandstone bodies
作者: Fielding C.R. ; Hutsky A.J. ; Hurd T.J.
刊名: AAPG Bulletin
ISSN: 0149-1598
EISSN: 1558-9328
出版年: 2014
发表日期: 2014
卷: 98, 期: 5 起始页码: 893
结束页码: 909
语种: 英语
Scopus关键词: Stratigraphy
; Bighorn basins
; Deltaic deposits
; Facies models
; Foreland basin
; Heterogeneous growth
; In-phase
; Wyoming
; Sandstone
; Cretaceous
; deltaic deposit
; facies
; foreland basin
; geometry
; lowstand
; nomenclature
; sandstone
; sequence stratigraphy
; shoreline
; Bighorn Basin
; North America
; United States
; Wyoming
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Sequence-stratigraphic concepts and nomenclature are predicated on the assumption that at any time, accommodation conditions are in phase across a depositional basin. In certain situations, however, such as in evolving retroarc foreland basins, the sense of accommodation may be spatially variable because of the growth of intrabasinal structures. Herein, we present evidence for the accumulation of a fluvially dominated deltaic sandstone under strong forcing from spatially and temporally variable low accommodation within the Cretaceous western Cordilleran foreland basin of North America. The Peay Sandstone Member is a coarsening-upward sandstone body (<60 m [<197 ft] thick) that is extensive across much of the eastern half of the present-day Bighorn Basin of Wyoming. It is remarkable for its elongate plan-form geometry, extending many tens of kilometers across the basin, and for distal thickening patterns that are, at face value, difficult to reconcile with conventional facies models for deltaic systems. The sandstone shows some of the characteristics of falling-stage and lowstand deltas (extending far into the basin from the contemporary shoreline to the west, lack of a preserved delta-plain topset) but is not incised into its substrate and does not show a descending regressive trajectory with respect to underlying strata. We submit that the Peay Sandstone Member was formed under a regime of both temporally and spatially variable accommodation forced by the heterogeneous growth of the fore-bulge within the western Cordilleran foreland basin and suggest that the origin of some other apparently isolated sandstone bodies in this and other basins might also be explained in a similar manner. Copyright © 2014. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902375491&doi=10.1306%2f10011313054&partnerID=40&md5=0376f28e883bae11b31a1ca8f2338e30
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13169
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Fielding C.R.,Hutsky A.J.,Hurd T.J.. Deltaic deposits formed under spatially and temporally variable accommodation regimes: A plausible alternative explanation for isolated shallow-marine sandstone bodies[J]. AAPG Bulletin,2014-01-01,98(5)